Social Bite co-founder Josh Littlejohn said: “Last year we asked the public to pay £5 to allow us to open on Christmas day and give local homeless people a place to go for a good meal.

George Clooney, pictured in Edinburgh's Social Bite sandwich shop in Edinburgh, has helped launch a new fundraising campaign

“Our target was to provide 800 meals. We were amazed by the response and received over 36,000 donations from all over the world meaning we not only fed folk at Christmas, we were able to feed them all year round in all five of our shops.

Clooney, 54, was greeted by hundreds of fans last month after he accepted an invitation to visit the cafe.

Josh continued” “When George visited our shop last month, we asked him to make the first donation and with such a global star on film supporting us we’re hoping we can smash last year’s total and help even more people.”

A web page has been set up where you can buy a homeless person Christmas dinner.

Scots can also contribute towards a convoy of Social Bite vans which is leaving on Boxing Day with food and winter essentials to refugee camps in Calais, the Serbia/Croatia border, and Lesbos.

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Josh added: “We still have unacceptable levels of homelessness and poverty here on our doorstep and we’re grateful for the public’s support in helping us to do our bit, but we can’t forget the horrendous conditions faced by millions of innocent men, women and children feeling conflict.

“We’re aware that the refugee crisis is a highly politicised issue and we’re well aware that our small chain of sandwich shops can’t make a huge dent in a continent-wide crisis – but doing nothing isn’t an option.

“It’s freezing there. Families are desperate for help and people will die from the cold this winter.

“Our trip is about reaching out a hand of compassion, and letting them know Scotland cares. We don’t know how many vans we’ll fill but we’ll take as many as we can with the donations we get.

“We’ve had amazing support from the outdoor clothing brand Trespass who have agreed to match each donation we receive with hats, gloves, coats and tents to help combat the subzero temperatures the refugees will have to endure in the winter months.”